Articles about storage, backup, virtualization, technology, innovation, programming, leadership, management,... etc
Articles about storage, backup, virtualization, technology, innovation, programming, leadership, management,... etc
Configuring Kubernetes Network Policies for pod-to-pod communication means defining rules that control traffic flow between pods. Network Policies are a Kubernetes resource that secures your cluster by limiting communication based on labels, namespaces, and IP blocks. Here’s a step-by-step guide: 1. Prerequisites Network plugin: Ensure your cluster uses a CNI plugin that supports Network Policies […]
Troubleshooting firewall rule conflicts in IT infrastructure requires a systematic approach to identify and resolve the issue effectively. Here’s a step-by-step guide: 1. Understand the Environment Identify where the firewall sits (datacenter edge, internal zones, Kubernetes cluster, etc.). List the systems, servers, and applications affected by the firewall rules. Confirm who manages the rules (network […]
Kubernetes secrets hold your most sensitive data — passwords, API keys, certificates. Here’s how to handle them properly. 1. Use Kubernetes Secrets objects Store sensitive information in Secret objects, not in ConfigMaps, environment variables, or container images. Secrets are base64-encoded, not encrypted. Treat them as plaintext until you enable encryption at rest. 2. Enable encryption […]
Troubleshooting pod crashes in Kubernetes involves several steps, depending on the root cause. Here’s how to identify and resolve them: 1. Identify the Problem Start by gathering information about the pod that is crashing: kubectl get pods kubectl describe pod <pod-name> kubectl logs <pod-name> kubectl get pods: Check the pod status; it might show CrashLoopBackOff, […]
Troubleshooting DNS resolution issues inside Kubernetes clusters can be challenging, but systematic steps can help identify and resolve the problem. Here’s a detailed guide: 1. Check Pod DNS Configuration Start by verifying the DNS configuration of the affected pod: – Get Pod’s DNS Info: bash kubectl exec -it <pod-name> — cat /etc/resolv.conf Look for: – […]
Configuring IT infrastructure for high-throughput computing (HTC) means building a system that processes large volumes of tasks efficiently. Here are the key steps and considerations: 1. Define Requirements Workload Analysis: Understand the applications you’ll run (simulations, batch processing, machine learning). Performance Metrics: Determine throughput, latency, scalability, and availability targets. Storage Needs: Assess data I/O volumes, […]
